Just do what I do: Paint over it with black paint, then use a stencil to paint a white penguin (or a red BSD demon, or whatever you fancy) on it. After all, the key itself is still functional. I have mine mapped to launch Firefox under Ubuntu.

Besides, we all know the real reason to buy Thinkpads. They are simply awesome laptops! If I wasn't so dead set on getting an iBook, I would have bought a Thinkpad by now.